#!/usr/bin/env python
# Update the coverity branch from the master branch.
# It is not done automatically because Coverity Scan limits
# the number of submissions per day.

from __future__ import print_function
import shutil, tempfile
from subprocess import check_output, STDOUT

class Git:
  def __init__(self, dir):
    self.dir = dir

  def __call__(self, *args):
    output = check_output(['git'] + list(args), cwd=self.dir, stderr=STDOUT)
    print(output)
    return output

dir = tempfile.mkdtemp()
try:
  git = Git(dir)
  git('clone', '-b', 'coverity', 'git@github.com:cppformat/cppformat.git', dir)
  output = git('merge', '-X', 'theirs', '--no-commit', 'origin/master')
  if 'Fast-forward' not in output:
    git('reset', 'HEAD', '.travis.yml')
    git('checkout', '--', '.travis.yml')
    git('commit', '-m', 'Update coverity branch')
  git('push')
finally:
  shutil.rmtree(dir)
